Matoury Weather in September

Matoury in September sees very high temperatures, with highs around 32°C (90°F) and overnight lows of 24°C (75°F). It's the driest month of the year, with very little rainfall to worry about.

Rainfall in Matoury in September

Conditions tend to be dry and settled, making it a good month for outdoor plans. Historically, approximately 4 days this month are expected to have rain, averaging 62 mm (2.4 in). When rain does fall this month, it tends to come down hard. The low number of rain days makes each shower more significant.

Temperature in Matoury in September

If you're visiting Matoury in September, expect highs of 32°C (90°F) and overnight lows around 24°C (75°F). It's usually most comfortable outside during the morning and later in the day. With lows around 24°C (75°F), the nights are warm enough that a sheet is usually all you need for bedding.

Sunshine in Matoury in September

With approximately 255 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.

Wind Speed in Matoury in September

Average wind speeds reach 3 m/s (6 knots) in September, creating light breezes that feel pleasant throughout the day. Some days are calmer, while others bring slightly more active breezes.

Average water temperature in September

At 28°C (82°F), the water is warm and comfortable for swimming. Most people find this temperature ideal for spending longer periods in the water.

If you're inclined towards comfortable temperatures and drier conditions, September is a good time to visit Matoury.

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit French Guiana, check out our Matoury's climate page.

Matoury Temperature in September

Min Temperature 24°C (75°F)  

Max Temperature 32°C (90°F)  

Water Temperature 28°C (82°F) *  

Chance of Rain 15%  

Precipitation 62 mm (2.4 in)  

Rainy days 4 days  

Humidity 71% *  

Windspeed 3 m/s (6 knots) *  

Sunshine 255 hours *  

Percentage Sunshine *  

* Data from: Cayenne, French Guiana (4 KM, 2 Miles).

Daily Historical Temperatures

46-year average (1976-2025)

Based on our historical records, temperatures in Matoury typically stay consistent throughout September, with daily highs averaging around 32°C (90°F). Nights are warm, with lows around 23°C (73°F).

Average temperatures in September

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Daily Historical Precipitation

46-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in September

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Historical weather for Matoury in September

Browse day-by-day weather records for Matoury spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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‹ January February March April May June July August September October November December ›

Matoury historical weather extremes in September

Our historical data for Matoury spans 1992 to 2025, revealing these weather extremes.

• The warmest day in September was on September 12, 1995, with a maximum of 36°C (97°F).
• The coldest September day was on September 26, 1999, with a maximum of 26°C (79°F).
• Matoury registered its coldest September night on September 11, 1997, with temperatures dropping to 20°C (68°F).

What to Wear in Matoury in September

Warm but pleasant conditions in Matoury in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Wet weather is likely, so pack waterproof gear for multiple rainy days. Expect water temperatures of around 28°C (82°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Matoury in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

9/10

Cycling

8/10

Walking

8/10

Camping

8/10

Outdoor sports

8/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit French Guiana, check out our Matoury's climate page.

More climate data for Matoury

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Matoury climate overview or explore weather in French Guiana.